- Expose and allow R/W access to the PCIe DVSEC capability through
vfio-pci, as we already do with the legacy vendor capability.
(K V P Satyanarayana)
- Fix kernel-doc issues with structure definitions. (Simon Horman)
- Clarify ordering of operations relative to the kvm-vfio device for
driver dependencies against the kvm pointer. (Yi Liu)
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Merge tag 'vfio-v6.4-rc1' of https://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson:
- Expose and allow R/W access to the PCIe DVSEC capability through
vfio-pci, as we already do with the legacy vendor capability
(K V P Satyanarayana)
- Fix kernel-doc issues with structure definitions (Simon Horman)
- Clarify ordering of operations relative to the kvm-vfio device for
driver dependencies against the kvm pointer (Yi Liu)
* tag 'vfio-v6.4-rc1' of https://github.com/awilliam/linux-vfio:
docs: kvm: vfio: Suggest KVM_DEV_VFIO_GROUP_ADD vs VFIO_GROUP_GET_DEVICE_FD ordering
vfio: correct kdoc for ops structures
vfio/pci: Add DVSEC PCI Extended Config Capability to user visible list.
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Merge tag 'afs-fixes-20230502' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS updates from David Howells:
"Three fixes to AFS directory handling:
- Make sure that afs_read_dir() sees any increase in file size if the
file unexpectedly changed on the server (e.g. due to another client
making a change).
- Make afs_getattr() always return the server's dir file size, not
the locally edited one, so that pagecache eviction doesn't cause
the dir file size to change unexpectedly.
- Prevent afs_read_dir() from getting into an endless loop if the
server indicates that the directory file size is larger than
expected"
* tag 'afs-fixes-20230502' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Avoid endless loop if file is larger than expected
afs: Fix getattr to report server i_size on dirs, not local size
afs: Fix updating of i_size with dv jump from server
- Add support for Renesas RZ/G2L MTU3
- New Device Support
- Add support for Lenovo Yoga Book X90F to Intel CHT WC
- Add support for MAX5970 and MAX5978 to Simple MFD (I2C)
- Add support for Meteor Lake PCH-S LPSS PCI to Intel LPSS PCI
- Add support for AXP15060 PMIC to X-Powers PMIC collection
- Remove Device Support
- Remove support for Samsung 5M8751 and S5M8763 PMIC devices
- New Functionality
- Convert deprecated QCOM IRQ Chip to config registers
- Add support for 32-bit address spaces to Renesas SMUs
- Fix-ups
- Make use of APIs / MACROs designed to simplify and demystify
- Add / improve Device Tree bindings
- Memory saving struct layout optimisations
- Remove old / deprecated functionality
- Factor out unassigned register addresses from ranges
- Trivial: Spelling fixes, renames and coding style fixes
- Rid 'defined but not used' warnings
- Remove ineffective casts and pointer stubs
- Bug Fixes
- Fix incorrectly non-inverted mask/unmask IRQs on QCOM platforms
- Remove MODULE_*() helpers from non-tristate drivers
- Do not attempt to use out-of-range memory addresses associated with io_base
- Provide missing export helpers
- Fix remap bulk read optimisation fallout
- Fix memory leak issues in error paths
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Merge tag 'mfd-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Drivers:
- Add support for Renesas RZ/G2L MTU3
New Device Support:
- Add support for Lenovo Yoga Book X90F to Intel CHT WC
- Add support for MAX5970 and MAX5978 to Simple MFD (I2C)
- Add support for Meteor Lake PCH-S LPSS PCI to Intel LPSS PCI
- Add support for AXP15060 PMIC to X-Powers PMIC collection
Remove Device Support:
- Remove support for Samsung 5M8751 and S5M8763 PMIC devices
New Functionality:
- Convert deprecated QCOM IRQ Chip to config registers
- Add support for 32-bit address spaces to Renesas SMUs
Fix-ups:
- Make use of APIs / MACROs designed to simplify and demystify
- Add / improve Device Tree bindings
- Memory saving struct layout optimisations
- Remove old / deprecated functionality
- Factor out unassigned register addresses from ranges
- Trivial: Spelling fixes, renames and coding style fixes
- Rid 'defined but not used' warnings
- Remove ineffective casts and pointer stubs
Bug Fixes:
- Fix incorrectly non-inverted mask/unmask IRQs on QCOM platforms
- Remove MODULE_*() helpers from non-tristate drivers
- Do not attempt to use out-of-range memory addresses associated with io_base
- Provide missing export helpers
- Fix remap bulk read optimisation fallout
- Fix memory leak issues in error paths"
* tag 'mfd-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (88 commits)
dt-bindings: mfd: ti,j721e-system-controller: Add SoC chip ID
leds: bd2606mvv: Driver for the Rohm 6 Channel i2c LED driver
dt-bindings: mfd: qcom,spmi-pmic: Document flash LED controller
dt-bindings: mfd: x-powers,axp152: Document the AXP15060 variant
mfd: axp20x: Add support for AXP15060 PMIC
dt-bindings: mfd: x-powers,axp152: Document the AXP313a variant
counter: rz-mtu3-cnt: Unlock on error in rz_mtu3_count_ceiling_write()
dt-bindings: mfd: dlg,da9063: Document voltage monitoring
dt-bindings: mfd: stm32: Remove unnecessary blank lines
dt-bindings: mfd: qcom,spmi-pmic: Use generic ADC node name in examples
dt-bindings: mfd: syscon: Add nuvoton,ma35d1-sys compatible
MAINTAINERS: Add entries for Renesas RZ/G2L MTU3a counter driver
counter: Add Renesas RZ/G2L MTU3a counter driver
Documentation: ABI: sysfs-bus-counter: add cascade_counts_enable and external_input_phase_clock_select
mfd: Add Renesas RZ/G2L MTU3a core driver
dt-bindings: timer: Document RZ/G2L MTU3a bindings
mfd: rsmu_i2c: Convert to i2c's .probe_new() again
mfd: intel-lpss: Add Intel Meteor Lake PCH-S LPSS PCI IDs
mfd: dln2: Fix memory leak in dln2_probe()
mfd: axp20x: Fix axp288 writable-ranges
...
- Add support for MediaTek MT6370 LED Indicator
- Add support for MediaTek MT6370 Flashlight
- Add support for QCOM PMIC Flash
- Add support for Rohm BD2606MVV Charge Pump LED
- New Device Support
- Add support for PMK8550 PWM to QCOM LPG
- New Functionality
- Add support for high resolution PWM to QCOM LPG
- Fix-ups
- Kconfig 'depends' and 'select' dependency changes
- Remove unused / irrelevant includes
- Remove unnecessary checks (already performed further into the call stack)
- Trivial: Fix commentary, simplify error messages
- Rid 'defined but not used' warnings
- Provide documentation
- Explicitly provide include files
- Bug Fixes
- Mark GPIO LED as BROKEN
- Fix Kconfig entries
- Fix various Smatch staticify reports
- Fix error handling (or a lack there of)
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Merge tag 'leds-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds
Pull LED updates from Lee Jones:
"New Drivers:
- Add support for MediaTek MT6370 LED Indicator
- Add support for MediaTek MT6370 Flashlight
- Add support for QCOM PMIC Flash
- Add support for Rohm BD2606MVV Charge Pump LED
New Device Support:
- Add support for PMK8550 PWM to QCOM LPG
New Functionality:
- Add support for high resolution PWM to QCOM LPG
Fix-ups:
- Kconfig 'depends' and 'select' dependency changes
- Remove unused / irrelevant includes
- Remove unnecessary checks (already performed further into the call stack)
- Trivial: Fix commentary, simplify error messages
- Rid 'defined but not used' warnings
- Provide documentation
- Explicitly provide include files
Bug Fixes:
- Mark GPIO LED as BROKEN
- Fix Kconfig entries
- Fix various Smatch staticify reports
- Fix error handling (or a lack there of)"
* tag 'leds-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds: (30 commits)
leds: bd2606mvv: Driver for the Rohm 6 Channel i2c LED driver
dt-bindings: leds: Add ROHM BD2606MVV LED
docs: leds: ledtrig-oneshot: Fix spelling mistake
leds: pwm-multicolor: Simplify an error message
dt-bindings: leds: Convert PCA9532 to dtschema
leds: rgb: leds-qcom-lpg: Add support for PMK8550 PWM
leds: rgb: leds-qcom-lpg: Add support for high resolution PWM
dt-bindings: leds-qcom-lpg: Add qcom,pmk8550-pwm compatible string
leds: tca6507: Fix error handling of using fwnode_property_read_string
leds: flash: Set variables mvflash_{3,4}ch_regs storage-class-specifier to static
leds: rgb: mt6370: Correct config name to select in LEDS_MT6370_RGB
MAINTAINERS: Add entry for LED devices documentation
Documentation: leds: MT6370: Use bullet lists for timing variables
Documentation: leds: mt6370: Properly wrap hw_pattern chart
Documentation: leds: Add MT6370 doc to the toctree
leds: rgb: mt6370: Fix implicit declaration for FIELD_GET
docs: leds: Add MT6370 RGB LED pattern document
leds: flash: mt6370: Add MediaTek MT6370 flashlight support
leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support
dt-bindings: leds: spmi-flash-led: Add pm6150l compatible
...
Changing my email address in CREDITS to be consistent with what's in use
in MAINTAINERS and mailmap. Also removed extra date information from the
CREDITS entry since I'm a maintainer for MPTCP again.
Signed-off-by: Mat Martineau <martineau@kernel.org>
Link: https://lore.kernel.org/r/20230502000545.2899055-1-martineau@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Commit 6538b8ea88 ("x86_64: expand kernel stack to 16K")
expanded kernel stack for x86_64 but left the wrong documentation,
update it.
Signed-off-by: Yan Yan <yanyan.yan@antgroup.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Link: https://lore.kernel.org/r/20230328072537.20188-1-yanyan.yan@antgroup.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
There is a non-printable unicode char '\u202a' or "0xe2 0x80 0xaa" in hex
in the translation doc. It is unnecessary and should be removed for better
text formatting when using editors like vi.
Signed-off-by: Tao Liu <ltao@redhat.com>
Reviewed-by: Yanteng Si <siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/20230426021452.9745-1-ltao@redhat.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Non-scalar time was removed from the ktime hybrid union in v3.17, and
the union itself followed suit in v4.10.
Make it clear that ktime_t is always a 64bit scalar type, to avoid
confusing the casual reader.
While at it, fix a spelling mistake.
Fixes: 24e4a8c3e8 ("ktime: Kill non-scalar ktime_t implementation for 2038")
Fixes: 2456e85535 ("ktime: Get rid of the union")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/59250a3d1c2c827b5c1833169a6e652ca6a784e6.1683021785.git.geert+renesas@glider.be
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
afs_read_dir fetches an amount of data that's based on what the inode
size is thought to be. If the file on the server is larger than what
was fetched, the code rechecks i_size and retries. If the local i_size
was not properly updated, this can lead to an endless loop of fetching
i_size from the server and noticing each time that the size is larger on
the server.
If it is known that the remote size is larger than i_size, bump up the
fetch size to that size.
Fixes: f3ddee8dc4 ("afs: Fix directory handling")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-afs@lists.infradead.org
Fix afs_getattr() to report the server's idea of the file size of a
directory rather than the local size. The local size may differ as we edit
the local copy to avoid having to redownload it and we may end up with a
differently structured blob of a different size.
However, if the directory is discarded from the pagecache we then download
it again and the user may see the directory file size apparently change.
Fixes: 63a4681ff3 ("afs: Locally edit directory data for mkdir/create/unlink/...")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
If the data version returned from the server is larger than expected,
the local data is invalidated, but we may still want to note the remote
file size.
Since we're setting change_size, we have to also set data_changed
for the i_size to get updated.
Fixes: 3f4aa98181 ("afs: Fix EOF corruption")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-afs@lists.infradead.org
Currently, the .got section is placed within the output section .text.
However, when .got is non-empty, the SHF_WRITE flag is set for .text
when linked by lld. GNU ld recognizes .text as a special section and
ignores the SHF_WRITE flag. By renaming .text, we can also get the
SHF_WRITE flag.
The kernel has performed R_AARCH64_RELATIVE resolving very early, and can
then assume that .got is read-only. Let's move .got to the vmlinux_rodata
pseudo-segment.
As Ard Biesheuvel notes:
"This matters to consumers of the vmlinux ELF representation of the
kernel image, such as syzkaller, which disregards writable PT_LOAD
segments when resolving code symbols. The kernel itself does not care
about this distinction, but given that the GOT contains data and not
code, it does not require executable permissions, and therefore does
not belong in .text to begin with."
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Fangrui Song <maskray@google.com>
Link: https://lore.kernel.org/r/20230502074105.1541926-1-maskray@google.com
Signed-off-by: Will Deacon <will@kernel.org>
commit d54170812e ("arm64: fix .idmap.text assertion for large kernels")
modified some of the section assembler directives that declare
.idmap.text to be SHF_ALLOC instead of
SHF_ALLOC|SHF_WRITE|SHF_EXECINSTR.
This patch fixes up the remaining stragglers that were left behind. Add
Fixes tag so that this doesn't precede related change in stable.
Fixes: d54170812e ("arm64: fix .idmap.text assertion for large kernels")
Reported-by: Greg Thelen <gthelen@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20230428-awx-v2-1-b197ffa16edc@google.com
Signed-off-by: Will Deacon <will@kernel.org>
The pointer auth hwcaps are not getting reported to userspace, as they
are missing the .matches field. Add the field back.
Fixes: 876e3c8efe ("arm64/cpufeature: Pull out helper for CPUID register definitions")
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230428132546.2513834-1-kristina.martsenko@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Automation complains:
warning: symbol '__pcpu_scope_misaligned_access_speed' was not declared. Should it be static?
cpufeature.c doesn't actually include the header of the same name, as it
had not previously used anything from it.
The per-cpu variable is declared there, so include it to silence the
complaints.
Fixes: 62a31d6e38 ("RISC-V: hwprobe: Support probing of misaligned access performance")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Evan Green <evan@rivosinc.com>
Link: https://lore.kernel.org/r/20230420-wound-gizzard-2b2b589d9bea@spud
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
- a new driver for Novatek touch controllers
- a new driver for power button for NXP BBNSM
- a skeleton KUnit tests for the input core
- improvements to Xpad game controller driver to support more devices
- improvements to edt-ft5x06, hideep and other drivers
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Merge tag 'input-for-v6.4-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
- a new driver for Novatek touch controllers
- a new driver for power button for NXP BBNSM
- a skeleton KUnit tests for the input core
- improvements to Xpad game controller driver to support more devices
- improvements to edt-ft5x06, hideep and other drivers
* tag 'input-for-v6.4-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (42 commits)
Revert "Input: xpad - fix support for some third-party controllers"
dt-bindings: input: pwm-beeper: convert to dt schema
Input: xpad - fix PowerA EnWired Controller guide button
Input: xpad - add constants for GIP interface numbers
Input: synaptics-rmi4 - fix function name in kerneldoc
Input: raspberrypi-ts - fix refcount leak in rpi_ts_probe
Input: edt-ft5x06 - select REGMAP_I2C
Input: melfas_mip4 - report palm touches
Input: cma3000_d0x - remove unneeded code
Input: edt-ft5x06 - calculate points data length only once
Input: edt-ft5x06 - unify the crc check
Input: edt-ft5x06 - convert to use regmap API
Input: edt-ft5x06 - don't print error messages with dev_dbg()
Input: edt-ft5x06 - remove code duplication
Input: edt-ft5x06 - don't recalculate the CRC
Input: edt-ft5x06 - add spaces to ensure format specification
Input: edt-ft5x06 - remove unnecessary blank lines
Input: edt-ft5x06 - fix indentation
Input: tsc2007 - enable cansleep pendown GPIO
Input: Add KUnit tests for some of the input core helper functions
...
The recent introduction of relocatable kernels prepared the move of
.rela.dyn to the init section, but actually forgot to do so, so do it
here.
Before this patch: "Freeing unused kernel image (initmem) memory: 2592K"
After this patch: "Freeing unused kernel image (initmem) memory: 6288K"
The difference corresponds to the size of the .rela.dyn section:
"[42] .rela.dyn RELA ffffffff8197e798 0127f798
000000000039c660 0000000000000018 A 47 0 8"
Fixes: 559d1e45a1 ("riscv: Use --emit-relocs in order to move .rela.dyn in init")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230428120932.22735-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
The dt-binding was defined before the extraction of csr access and
fence.i into their own extensions, and thus the presence of the I
base extension implies Zicsr and Zifencei.
There's no harm in adding them obviously, but for backwards
compatibility with DTs that existed prior to that extraction, software
is unable to differentiate between "i" and "i_zicsr_zifencei" without
any further information.
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230427-fence-blurred-c92fb69d4137@wendy
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
* More phys_to_virt conversions
* Improvement of AP management for VSIE (nested virtualization)
ARM64:
* Numerous fixes for the pathological lock inversion issue that
plagued KVM/arm64 since... forever.
* New framework allowing SMCCC-compliant hypercalls to be forwarded
to userspace, hopefully paving the way for some more features
being moved to VMMs rather than be implemented in the kernel.
* Large rework of the timer code to allow a VM-wide offset to be
applied to both virtual and physical counters as well as a
per-timer, per-vcpu offset that complements the global one.
This last part allows the NV timer code to be implemented on
top.
* A small set of fixes to make sure that we don't change anything
affecting the EL1&0 translation regime just after having having
taken an exception to EL2 until we have executed a DSB. This
ensures that speculative walks started in EL1&0 have completed.
* The usual selftest fixes and improvements.
KVM x86 changes for 6.4:
* Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled,
and by giving the guest control of CR0.WP when EPT is enabled on VMX
(VMX-only because SVM doesn't support per-bit controls)
* Add CR0/CR4 helpers to query single bits, and clean up related code
where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return
as a bool
* Move AMD_PSFD to cpufeatures.h and purge KVM's definition
* Avoid unnecessary writes+flushes when the guest is only adding new PTEs
* Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations
when emulating invalidations
* Clean up the range-based flushing APIs
* Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single
A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle
changed SPTE" overhead associated with writing the entire entry
* Track the number of "tail" entries in a pte_list_desc to avoid having
to walk (potentially) all descriptors during insertion and deletion,
which gets quite expensive if the guest is spamming fork()
* Disallow virtualizing legacy LBRs if architectural LBRs are available,
the two are mutually exclusive in hardware
* Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES)
after KVM_RUN, similar to CPUID features
* Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES
* Apply PMU filters to emulated events and add test coverage to the
pmu_event_filter selftest
x86 AMD:
* Add support for virtual NMIs
* Fixes for edge cases related to virtual interrupts
x86 Intel:
* Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is
not being reported due to userspace not opting in via prctl()
* Fix a bug in emulation of ENCLS in compatibility mode
* Allow emulation of NOP and PAUSE for L2
* AMX selftests improvements
* Misc cleanups
MIPS:
* Constify MIPS's internal callbacks (a leftover from the hardware enabling
rework that landed in 6.3)
Generic:
* Drop unnecessary casts from "void *" throughout kvm_main.c
* Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct
size by 8 bytes on 64-bit kernels by utilizing a padding hole
Documentation:
* Fix goof introduced by the conversion to rST
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini:
"s390:
- More phys_to_virt conversions
- Improvement of AP management for VSIE (nested virtualization)
ARM64:
- Numerous fixes for the pathological lock inversion issue that
plagued KVM/arm64 since... forever.
- New framework allowing SMCCC-compliant hypercalls to be forwarded
to userspace, hopefully paving the way for some more features being
moved to VMMs rather than be implemented in the kernel.
- Large rework of the timer code to allow a VM-wide offset to be
applied to both virtual and physical counters as well as a
per-timer, per-vcpu offset that complements the global one. This
last part allows the NV timer code to be implemented on top.
- A small set of fixes to make sure that we don't change anything
affecting the EL1&0 translation regime just after having having
taken an exception to EL2 until we have executed a DSB. This
ensures that speculative walks started in EL1&0 have completed.
- The usual selftest fixes and improvements.
x86:
- Optimize CR0.WP toggling by avoiding an MMU reload when TDP is
enabled, and by giving the guest control of CR0.WP when EPT is
enabled on VMX (VMX-only because SVM doesn't support per-bit
controls)
- Add CR0/CR4 helpers to query single bits, and clean up related code
where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long"
return as a bool
- Move AMD_PSFD to cpufeatures.h and purge KVM's definition
- Avoid unnecessary writes+flushes when the guest is only adding new
PTEs
- Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s
optimizations when emulating invalidations
- Clean up the range-based flushing APIs
- Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a
single A/D bit using a LOCK AND instead of XCHG, and skip all of
the "handle changed SPTE" overhead associated with writing the
entire entry
- Track the number of "tail" entries in a pte_list_desc to avoid
having to walk (potentially) all descriptors during insertion and
deletion, which gets quite expensive if the guest is spamming
fork()
- Disallow virtualizing legacy LBRs if architectural LBRs are
available, the two are mutually exclusive in hardware
- Disallow writes to immutable feature MSRs (notably
PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features
- Overhaul the vmx_pmu_caps selftest to better validate
PERF_CAPABILITIES
- Apply PMU filters to emulated events and add test coverage to the
pmu_event_filter selftest
- AMD SVM:
- Add support for virtual NMIs
- Fixes for edge cases related to virtual interrupts
- Intel AMX:
- Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if
XTILE_DATA is not being reported due to userspace not opting in
via prctl()
- Fix a bug in emulation of ENCLS in compatibility mode
- Allow emulation of NOP and PAUSE for L2
- AMX selftests improvements
- Misc cleanups
MIPS:
- Constify MIPS's internal callbacks (a leftover from the hardware
enabling rework that landed in 6.3)
Generic:
- Drop unnecessary casts from "void *" throughout kvm_main.c
- Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the
struct size by 8 bytes on 64-bit kernels by utilizing a padding
hole
Documentation:
- Fix goof introduced by the conversion to rST"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits)
KVM: s390: pci: fix virtual-physical confusion on module unload/load
KVM: s390: vsie: clarifications on setting the APCB
KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA
KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state
KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init()
KVM: selftests: Test the PMU event "Instructions retired"
KVM: selftests: Copy full counter values from guest in PMU event filter test
KVM: selftests: Use error codes to signal errors in PMU event filter test
KVM: selftests: Print detailed info in PMU event filter asserts
KVM: selftests: Add helpers for PMC asserts in PMU event filter test
KVM: selftests: Add a common helper for the PMU event filter guest code
KVM: selftests: Fix spelling mistake "perrmited" -> "permitted"
KVM: arm64: vhe: Drop extra isb() on guest exit
KVM: arm64: vhe: Synchronise with page table walker on MMU update
KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc()
KVM: arm64: nvhe: Synchronise with page table walker on TLBI
KVM: arm64: Handle 32bit CNTPCTSS traps
KVM: arm64: nvhe: Synchronise with page table walker on vcpu run
KVM: arm64: vgic: Don't acquire its_lock before config_lock
KVM: selftests: Add test to verify KVM's supported XCR0
...
Two things for OpenRISC this cycle.
- Small cleanup for device tree cpu iteration from Rob Herring
- Add support for storing, restoring and accessing user space FPU state, to
allow for libc to support the FPU on OpenRISC.
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Merge tag 'for-linus' of https://github.com/openrisc/linux
Pull OpenRISC updates from Stafford Horne:
"Two things for OpenRISC this cycle:
- Small cleanup for device tree cpu iteration from Rob Herring
- Add support for storing, restoring and accessing user space FPU
state, to allow for libc to support the FPU on OpenRISC"
* tag 'for-linus' of https://github.com/openrisc/linux:
openrisc: Add floating point regset
openrisc: Support floating point user api
openrisc: Support storing and restoring fpu state
openrisc: Properly store r31 to pt_regs on unhandled exceptions
openrisc: Use common of_get_cpu_node() instead of open-coding
Subsystem:
- Convert to platform remove callback returning void
Drivers:
- meson-vrtc: fix a firmware display issue
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Merge tag 'rtc-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"Not much this cycle, there is the conversion to remove_new and many
small fixes in drivers:
Subsystem:
- Convert to platform remove callback returning void
Drivers:
- meson-vrtc: fix a firmware display issue"
* tag 'rtc-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (53 commits)
rtc: armada38x: use devm_platform_ioremap_resource_byname()
rtc: sunplus: use devm_platform_ioremap_resource_byname()
rtc: jz4740: Make sure clock provider gets removed
rtc: k3: handle errors while enabling wake irq
rtc: meson-vrtc: Use ktime_get_real_ts64() to get the current time
dt-bindings: rtc: Drop unneeded quotes
rtc: pcf8523: remove unnecessary OR operation
rtc: pcf8523: fix coding-style issues
rtc: ds1390: mark OF related data as maybe unused
rtc: omap: include header for omap_rtc_power_off_program prototype
rtc: sun6i: Use of_property_present() for testing DT property presence
rtc: mpfs: convert SOC_MICROCHIP_POLARFIRE to ARCH_MICROCHIP_POLARFIRE
rtc: zynqmp: Convert to platform remove callback returning void
rtc: xgene: Convert to platform remove callback returning void
rtc: wm8350: Convert to platform remove callback returning void
rtc: vt8500: Convert to platform remove callback returning void
rtc: twl: Convert to platform remove callback returning void
rtc: tps6586x: Convert to platform remove callback returning void
rtc: tegra: Convert to platform remove callback returning void
rtc: sunplus: Convert to platform remove callback returning void
...
Subsystem:
- OF alias bus numbering
- convert to platform remove callback returning void
New driver: AST2600 controller, based on Synopsys DesignWare IP
Drivers:
- dw: add infrastructure to support different platform integrations
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Merge tag 'i3c/for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux
Pull i3c updates from Alexandre Belloni:
"Subsystem:
- OF alias bus numbering
- convert to platform remove callback returning void
New driver:
- AST2600 controller, based on Synopsys DesignWare IP
Driver update:
- dw: add infrastructure to support different platform integrations"
* tag 'i3c/for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
i3c: ast2600: set variable ast2600_i3c_ops storage-class-specifier to static
i3c: ast2600: fix register setting for 545 ohm pullups
i3c: ast2600: enable IBI support
i3c: dw: Add a platform facility for IBI PEC workarounds
i3c: dw: Add support for in-band interrupts
i3c: dw: Turn DAT array entry into a struct
i3c: dw: Create a generic fifo read function
i3c: Allow OF-alias-based persistent bus numbering
i3c: ast2600: Add AST2600 platform-specific driver
dt-bindings: i3c: Add AST2600 i3c controller
i3c: dw: Add infrastructure for platform-specific implementations
i3c: dw: use bus mode rather than device reg for conditional tCAS setting
i3c: dw: Return the length from a read priv_xfer
i3c: svc: Convert to platform remove callback returning void
i3c: mipi-i3c-hci: Convert to platform remove callback returning void
i3c: cdns: Convert to platform remove callback returning void
i3c: dw: Convert to platform remove callback returning void
i3c: Make i3c_master_unregister() return void
i3c: dw: drop of_match_ptr for ID table
i3c: Correct reference to the I²C device data type
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Some ext4 regression and bug fixes"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: clean up error handling in __ext4_fill_super()
ext4: reflect error codes from ext4_multi_mount_protect() to its callers
ext4: fix lost error code reporting in __ext4_fill_super()
ext4: fix unused iterator variable warnings
ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
ext4: fix i_disksize exceeding i_size problem in paritally written case
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Merge tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
- deferred close fix for an important case when cached file should be
closed immediately
- two fixes for missing locks
- eight minor cleanup
* tag '6.4-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal module version number for cifs.ko
smb3: move some common open context structs to smbfs_common
smb3: make query_on_disk_id open context consistent and move to common code
SMB3.1.1: add new tree connect ShareFlags
cifs: missing lock when updating session status
SMB3: Close deferred file handles in case of handle lease break
SMB3: Add missing locks to protect deferred close file list
cifs: Avoid a cast in add_lease_context()
cifs: Simplify SMB2_open_init()
cifs: Simplify SMB2_open_init()
cifs: Simplify SMB2_open_init()
cherry pick issue and tested with real hardare and libvirt/qemu plus
swtpm.
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Merge tag 'tpmdd-v6.4-rc1-fix-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm fix from Jarkko Sakkinen:
"This fixes a critical bug in my first pull request.
I fixed the cherry pick issue and tested with real hardare and
libvirt/qemu plus swtpm"
* tag 'tpmdd-v6.4-rc1-fix-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
tpm: Re-enable TPM chip boostrapping non-tpm_tis TPM drivers
Add basic support for LoongArch, which is very similar to the MIPS
version.
Signed-off-by: Ming Wang <wangming01@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The ftrace samples need per-architecture trampoline implementations to
save and restore argument registers around the calls to my_direct_func*
and to restore polluted registers (e.g: ra).
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Select the HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS to provide the
register_ftrace_direct[_multi] interfaces allowing users to register
the customed trampoline (direct_caller) as the mcount for one or more
target functions. And modify_ftrace_direct[_multi] are also provided
for modifying direct_caller.
There are a few cases to distinguish:
- If a direct call ops is the only one tracing a function AND the direct
called trampoline is within the reach of a 'bl' instruction
-> the ftrace patchsite jumps to the trampoline
- Else
-> the ftrace patchsite jumps to the ftrace_regs_caller trampoline points
to ftrace_list_ops so it iterates over all registered ftrace ops,
including the direct call ops and calls its call_direct_funcs handler
which stores the direct called trampoline's address in the ftrace_regs
and the ftrace_regs_caller trampoline will return to that address
instead of returning to the traced function
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
In the module processing functions, the same logic can be reused by
implementing ftrace_find_callable_addr().
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
We can see the following build error if CONFIG_DYNAMIC_FTRACE_WITH_REGS
is not set on LoongArch:
arch/loongarch/kernel/ftrace_dyn.c: In function ‘ftrace_make_call’:
arch/loongarch/kernel/ftrace_dyn.c:167:23: error: implicit declaration of function ‘__get_mod’
167 | ret = __get_mod(&mod, pc);
| ^~~~~~~~~
arch/loongarch/kernel/ftrace_dyn.c:171:24: error: implicit declaration of function ‘get_plt_addr’
171 | addr = get_plt_addr(mod, addr);
| ^~~~~~~~~~~~
The reason is that the __get_mod() and get_plt_addr() may be called in
ftrace_make_{call,nop}.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Add new ftrace_regs_{get,set}_*() helpers which can be used to manipulate
ftrace_regs. When CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y, these can always
be used on any ftrace_regs, and when CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
=n these can be used when regs are available.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Inspired by the commit 42d038c4fb ("arm64: Add support for function
error injection") and the commit ee55ff803b ("riscv: Add support for
function error injection"), this patch supports function error injection
for LoongArch.
Mainly implement two functions:
(1) regs_set_return_value() which is used to overwrite the return value,
(2) override_function_with_return() which is used to override the probed
function returning and jump to its caller.
Here is a simple test under CONFIG_FUNCTION_ERROR_INJECTION and
CONFIG_FAIL_FUNCTION:
# echo sys_clone > /sys/kernel/debug/fail_function/inject
# echo 100 > /sys/kernel/debug/fail_function/probability
# dmesg
bash: fork: Invalid argument
# dmesg
...
FAULT_INJECTION: forcing a failure.
name fail_function, interval 1, probability 100, space 0, times 1
...
Call Trace:
[<90000000002238f4>] show_stack+0x5c/0x180
[<90000000012e384c>] dump_stack_lvl+0x60/0x88
[<9000000000b1879c>] should_fail_ex+0x1b0/0x1f4
[<900000000032ead4>] fei_kprobe_handler+0x28/0x6c
[<9000000000230970>] kprobe_breakpoint_handler+0xf0/0x118
[<90000000012e3e60>] do_bp+0x2c4/0x358
[<9000000002241924>] exception_handlers+0x1924/0x10000
[<900000000023b7d0>] sys_clone+0x0/0x4
[<90000000012e4744>] do_syscall+0x7c/0x94
[<9000000000221e44>] handle_syscall+0xc4/0x160
Tested-by: Hengqi Chen <hengqi.chen@gmail.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
FORTIFY_SOURCE could detect various overflows at compile and run time.
ARCH_HAS_FORTIFY_SOURCE means that the architecture can be built and run
with CONFIG_FORTIFY_SOURCE. So select it in LoongArch.
See more about this feature from commit 6974f0c455 ("include/linux/
string.h: add the option of fortified string.h functions").
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
With a blatant copy of some MIPS bits we introduce the crc32 and crc32c
hw accelerated module to LoongArch.
LoongArch has provided these instructions to calculate crc32 and crc32c:
* crc.w.b.w crcc.w.b.w
* crc.w.h.w crcc.w.h.w
* crc.w.w.w crcc.w.w.w
* crc.w.d.w crcc.w.d.w
So we can make use of these instructions to improve the performance of
calculation for crc32(c) checksums.
As can be seen from the following test results, crc32(c) instructions
can improve the performance by 58%.
Software implemention Hardware acceleration
Buffer size time cost (seconds) time cost (seconds) Accel.
100 KB 0.000845 0.000534 59.1%
1 MB 0.007758 0.004836 59.4%
10 MB 0.076593 0.047682 59.4%
100 MB 0.756734 0.479126 58.5%
1000 MB 7.563841 4.778266 58.5%
Signed-off-by: Min Zhou <zhoumin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
LoongArch platform is 64-bit system, which supports 8-bytes memory
accessing, but generic checksum functions use 4-byte memory access.
So add 8-bytes memory access optimization for checksum functions on
LoongArch. And the code comes from arm64 system.
When network hw checksum is disabled, iperf performance improves about
10% with this patch.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Provide kernel_fpu_begin()/kernel_fpu_end() to allow the kernel itself
to use fpu. They can be used by some other kernel components, e.g., the
AMDGPU graphic driver for DCN.
Reported-by: WANG Xuerui <kernel@xen0n.name>
Tested-by: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
SEGV_BNDERR was introduced initially for supporting the Intel MPX, but
fell into disuse after the MPX support was removed. The LoongArch
bounds-checking instructions behave very differently than MPX, but
overall the interface is still kind of suitable for conveying the
information to userland when bounds-checking assertions trigger, so we
wouldn't have to invent more UAPI. Specifically, when the BCE triggers,
a SEGV_BNDERR is sent to userland, with si_addr set to the out-of-bounds
address or value (in asrt{gt,le}'s case), and one of si_lower or
si_upper set to the configured bound depending on the faulting
instruction. The other bound is set to either 0 or ULONG_MAX to resemble
a range with both lower and upper bounds.
Note that it is possible to have si_addr == si_lower in case of a
failing asrtgt or {ld,st}gt, because those instructions test for strict
greater-than relationship. This should not pose a problem for userland,
though, because the faulting PC is available for the application to
associate back to the exact instruction for figuring out the
expectation.
Example exception context generated by a faulting `asrtgt.d t0, t1`
(assert t0 > t1 or BCE) with t0=100 and t1=200:
> pc 00005555558206a4 ra 00007ffff2d854fc tp 00007ffff2f2f180 sp 00007ffffbf9fb80
> a0 0000000000000002 a1 00007ffffbf9fce8 a2 00007ffffbf9fd00 a3 00007ffff2ed4558
> a4 0000000000000000 a5 00007ffff2f044c8 a6 00007ffffbf9fce0 a7 fffffffffffff000
> t0 0000000000000064 t1 00000000000000c8 t2 00007ffffbfa2d5e t3 00007ffff2f12aa0
> t4 00007ffff2ed6158 t5 00007ffff2ed6158 t6 000000000000002e t7 0000000003d8f538
> t8 0000000000000005 u0 0000000000000000 s9 0000000000000000 s0 00007ffffbf9fce8
> s1 0000000000000002 s2 0000000000000000 s3 00007ffff2f2c038 s4 0000555555820610
> s5 00007ffff2ed5000 s6 0000555555827e38 s7 00007ffffbf9fd00 s8 0000555555827e38
> ra: 00007ffff2d854fc
> ERA: 00005555558206a4
> CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
> PRMD: 00000007 (PPLV3 +PIE -PWE)
> EUEN: 00000000 (-FPE -SXE -ASXE -BTE)
> ECFG: 0007181c (LIE=2-4,11-12 VS=7)
> ESTAT: 000a0000 [BCE] (IS= ECode=10 EsubCode=0)
> PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Use ISA manual names for BADV and CPUCFG.PRID lines in show_regs(), for
stylistic consistency with the other lines already touched.
While at it, also include current CPU's full name in show_regs() output.
It may be more helpful for developers looking at the resulting dumps,
because multiple distinct CPU models may share the same PRID. Not having
this info available may hide problems only found on some but not all of
the models sharing one specific PRID.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Example output looks like:
[ xx.xxxxxx] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
Some initial machinery for this pretty-printing format has been included
in this patch as well.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Linus Torvalds